/*
 * Copyright (c) 2018-2020 "Graph Foundation,"
 * Graph Foundation, Inc. [https://graphfoundation.org]
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
 * Copyright (c) 2002-2020 "Neo4j,"
 * Neo4j Sweden AB [http://neo4j.com]
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.neo4j.cypher.internal.frontend.v3_4

package object helpers {

  def closing[Resource <: AutoCloseable, Result](resource: Resource)(block: => Result)(
    implicit onSuccess: Resource => Unit = (r: Resource) => {},
             onError: (Resource, Throwable) => Unit = (r: Resource, t: Throwable) => {}): Result = {
    using(resource){ _ => block }
  }

  def using[Resource <: AutoCloseable, Result](resource: Resource)(block: Resource => Result)(
    implicit onSuccess: Resource => Unit = (r: Resource) => {},
             onError: (Resource, Throwable) => Unit = (r: Resource, t: Throwable) => {}): Result = {
    var failure = false
    try {
      block(resource)
    } catch {
      case f: Throwable =>
        failure = true
        try {
          try {
            onError(resource, f)
          } finally {
            resource.close()
          }
        } catch {
          case sub: Throwable =>
            f.addSuppressed(sub)
        }
        throw f
    } finally {
      if(!failure) {
        try {
          onSuccess(resource)
        } finally {
          resource.close()
        }
      }
    }
  }
}
